This class represents the font dictionary. This is definitively detailed in:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; page 254.

This class is always an indirect object because GraphicsStateParameterElement.EntryFont requires it to be so.

System.Object
   WebSupergoo.ABCpdf12.Elements.Element
      WebSupergoo.ABCpdf12.Elements.FontElement
         WebSupergoo.ABCpdf12.Elements.CIDFontElement
         WebSupergoo.ABCpdf12.Elements.TrueTypeFontElement
         WebSupergoo.ABCpdf12.Elements.Type0FontElement
         WebSupergoo.ABCpdf12.Elements.Type1FontElement
         WebSupergoo.ABCpdf12.Elements.Type3FontElement